Updated docs for clearUpdates method and added logging. (#1329)

Author: NickToropov

android/app/src/main/java/com/microsoft/codepush/react/CodePushNativeModule.java

@@ -588,8 +588,16 @@ public void downloadAndReplaceCurrentBundle(String remoteBundleUrl) {
         }
     }
 
+    /**
+     * This method clears CodePush's downloaded updates.
+     * It is needed to switch to a different deployment if the current deployment is more recent.
+     * Note: we don’t recommend to use this method in scenarios other than that (CodePush will call
+     * this method automatically when needed in other cases) as it could lead to unpredictable
+     * behavior.
+     */
     @ReactMethod
     public void clearUpdates() {
+        CodePushUtils.log("Clearing updates.");
         mCodePush.clearUpdates();
     }
 }

docs/api-js.md

@@ -28,7 +28,9 @@ When you require `react-native-code-push`, the module object provides the follow
 
 * [sync](#codepushsync): Allows checking for an update, downloading it and installing it, all with a single call. Unless you need custom UI and/or behavior, we recommend most developers to use this method when integrating CodePush into their apps
 
-* [clearUpdates](#clearupdates): Clear all downloaded CodePush updates. This is useful when switching to a different deployment which may have an older release than the current package.
+* [clearUpdates](#clearupdates): Clear all downloaded CodePush updates. This is useful when switching to a different deployment which may have an older release than the current package. 
+   
+    _Note: we don’t recommend to use this method in scenarios other than that (CodePush will call this method automatically when needed in other cases) as it could lead to unpredictable behavior._
 
 #### codePush
 

ios/CodePush/CodePush.m

@@ -870,8 +870,11 @@ -(void)loadBundleOnTick:(NSTimer *)timer {
 /*
  * This method clears CodePush's downloaded updates.
  * It is needed to switch to a different deployment if the current deployment is more recent.
+ * Note: we don’t recommend to use this method in scenarios other than that (CodePush will call this method
+ * automatically when needed in other cases) as it could lead to unpredictable behavior.
  */
 RCT_EXPORT_METHOD(clearUpdates) {
+    CPLog(@"Clearing updates.");
     [CodePush clearUpdates];
 }
 

typings/react-native-code-push.d.ts

@@ -276,6 +276,8 @@ declare namespace CodePush {
     /**
      * Clear all downloaded CodePush updates.
      * This is useful when switching to a different deployment which may have an older release than the current package.
+     * Note: we don’t recommend to use this method in scenarios other than that (CodePush will call
+     * this method automatically when needed in other cases) as it could lead to unpredictable behavior.
      */
     function clearUpdates(): void;